JP2002282860A5 - Pool water purification treatment method - Google Patents

Description

[Claims]
(1)
A pool water purification treatment method having a filtration step, a sterilization step, and an adsorption purification step ,
A pool water purification method comprising an electrolysis step of pool water that has passed through each of the steps in a predetermined order .
(2)
The pool water purification method according to claim 1, wherein an acidic liquid and an alkaline liquid generated in the electrolysis step are mixed and refluxed to a pool.
[Claim 3 ]
3. The pool water purification method according to claim 1, further comprising a step of adding a chlorine preparation for disinfection in at least one of a first stage and a second stage of the electrolysis step. 4.
(4)
The filtration step comprises a cylindrical body having an outer peripheral surface in contact with the pool water before purification and an inner peripheral surface defining a central through hole through which the pool water before purification flows. A cylindrical porous ceramic filter having a plurality of through-holes through which purified pool water flows in the axial direction in a thick portion between the peripheral surface and the pool water is used, and the porous ceramic filter is pre-coated with activated carbon. The pool water purification method according to any one of claims 1 to 3, wherein the method is performed.

In the pool water purification treatment device 10 illustrated in FIG. 2, the pool water filtered by the ceramic filter 20 is collected through a valve 84 b and sent to the sterilizing unit 90.

As the electrolysis proceeds, the water near the cathode becomes weakly acidic and the water near the anode becomes slightly alkaline. Therefore, the two are mixed in the mixing section 92, and if necessary, the pH is further adjusted so as to be within a predetermined range, and then sent out from the pool water purification treatment apparatus 10 .

As described above, the pool water that has been highly purified by the pool water purification device 10 then flows into the ultrafiltration device 26, where it is further highly purified, and returned to the pool 12. At this time, if necessary, it is possible to heat to a predetermined temperature through a heat exchanger.
The ultrafiltration device 26 separates and removes viruses smaller than fungi, such as AIDS virus, influenza virus, Japanese encephalitis virus, hepatitis virus, and proteins, which cannot be separated and removed by the ceramic filter 20. In this, a number of ultrafiltration membranes such as hollow fiber membranes are arranged.

The filter aid supply unit 22 forms a filter aid layer that constantly maintains the filtering ability of the ceramic filter 20 of the microfiltration unit 84 in the pool water purification treatment apparatus 10 in a good state, and facilitates washing and backwashing. Before the use of the microfiltration section 84, the filter aid is supplied to the ceramic filter 20 in the pool water purification treatment apparatus 10 by a slurry pump.

Further, in the present invention, it is preferable to use a secondary auxiliary layer made of powdered activated carbon on the primary auxiliary layer formed of such a fibrous filter aid and the like. As a result, a novel effect that it is possible to easily remove bound chlorine, which is extremely difficult with the conventional method, by utilizing the adsorption capacity of activated carbon is obtained. In addition, since the activated carbon layer is formed on the primary auxiliary layer formed of a fibrous filter aid or the like, it is difficult to cause clogging of the ceramic filter 20 even when powdered activated carbon is used. effective.

In the pool water purification treatment system shown in FIG. 1 which is basically configured as described above, the pool water overflowing from the pool 12 flows into the overflow tank 14 and is filtered by the pre-filters 16, 16 such as hair, lint, etc. After the relatively large impurities are removed, they flow into the pool water purification treatment device 10 by the action of the circulation pumps 18.

The pool water, which has undergone electrolysis in the electrolyzing unit 88 to change the salt into an effective disinfectant component, is converted into a pool of acidic water and alkaline water similarly generated in the electrolyzing unit 88. It is sent out from the purification processing device 10 . Thereafter, the pool water that has been highly purified by the pool water purification treatment device 10 flows into the ultrafiltration device 26, is further ultrafiltered, and is returned to the pool 12 as the purified pool water.

According to the pool water purification treatment apparatus 10 shown in the above embodiment, it is possible to efficiently perform the processing required for the pool water purification treatment apparatus, such as filtration, sterilization, and adsorption purification of impurities. An effect is obtained that a pool water purification treatment device that can effectively utilize salt released from the human body brought into water can be realized.
Further, according to the pool water purification treatment apparatus 10 shown in the above embodiment, there is also obtained an effect that NaCl (sodium chloride) contained as an impurity in a chlorine preparation used for sterilization can be effectively used. This leads to a reduction in the production of chlorine products, and can be greatly appreciated from the viewpoint of global environmental protection.